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26220054SpecialPurposeRubberProductsVol.26No.2April2005(67,266042):,,,:;;:TQ33014+93:A:1005-4030(2005)02-0024-04:2004-07-30:(1964-),,,,,,,,,,,,,,,,,1,(a)(b)(c)3[1],1,1,(),Vx(),Q,XVx?,QVx2,2(a),,,:Q=4R21V1=4R22V2(1):V1,V212,m/s;R1,R212,m(1):V1/V2=(R2/R1)2(2)(2),,,,2(b),,200525,,:Q=2R21V1=2R22V2(3)(1)(3),,,,2,,2,,,[2],,,,,211,,,,,,1:Q=3600AVp1(4):Q,m3/h;A,m2;Vp1,m/s1m/s,(1);(2);(3)0125015,(1);(2);(3)015110,(1);(2);(3)110215,(1);(2);(3)215103(a),3(b)::A=LW(5):L=l+015h(6)W=w+015h(7):A=R2(8):R=r+0.25h(9):L,m;W,m;l,m;w,m;h,m;R,m;r,m(4),Vp1,Q,Alw,Q,h,,h,,60,;60,262623,,,60[3]2124,:Q=3600GhVp2(10):Q,m3/h;G,m;,G=2LW;,G=2R;Vp2m/s,,0122m/s4213,:,,,3,,,,,,,,,,,,,,,:[1]1[M]1:,2004,2341[2]1[M]1:,2003,71[3]1[M]1:,1997,1231(29)200529[1],,,[2],,1913%,1716%,50250,-20,60mm,213105,1171053513%3:(1)(),;(2);(3),:[1]1[M]1:,199813711[2]1[J]1,2003,24(1):25-261AccordionFoldedBootofShock2absorbingCylinderCavity2AirPressureFormingProcessLIUJin2wen(ChangleRubberMachineryTestPlant,QingdaoDesignInstituteofRubberIndustry,Changle262400,China)Abstract:Thekeytechniqueofairpressureformingprocesstoproduceaccordionfoldedbootforvehicle,thattheratioofthediametertolengthwas50250,wassummarized.Theagingproperty,crackandfatigureresistanceofaccordionfoldedbootwerereviewedinpractice.Keywords:shock2absorbingcylinder,wave,protectiveboot,airpressureforming(26)DesignandCalculationofDustAbsorbingCoverintheVentilatingandDustRemovingSystemLIZhi2hua(QingdaoUniversityofScience&Technology,Qingdao266042,China)Abstract:Thedustabsorbingcoverwasanimportantpartintheventilatinganddustremovingsystem.Byanalyzingtheairflowingregular,thedesigningandcalculatingmethodsforthedustab2sorbingcoverwasputforward,thedesigningprinciplebeingfollowed,andthebasisforexactlydesig2ningtheventilatinganddustremovingsystemwasprovided.Keywords:dustremoving,dustabsorbingcover,designandcalculation